Remove the allow-displaying-mixed-content setting from Blink.

android_webview/renderer/aw_content_settings_client.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "android_webview/renderer/aw_content_settings_client.h"
 
 #include "content/public/renderer/render_frame.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "url/gurl.h"
@@ skipping 15 matching lines @@
 
 AwContentSettingsClient::AwContentSettingsClient(
     content::RenderFrame* render_frame)
     : content::RenderFrameObserver(render_frame) {
   render_frame->GetWebFrame()->setContentSettingsClient(this);
 }
 
 AwContentSettingsClient::~AwContentSettingsClient() {
 }
 
-bool AwContentSettingsClient::allowDisplayingInsecureContent(
-      bool enabled_per_settings,
-      const blink::WebURL& url) {
-  return enabled_per_settings ? true : AllowMixedContent(url);
-}
-
 bool AwContentSettingsClient::allowRunningInsecureContent(
       bool enabled_per_settings,
       const blink::WebSecurityOrigin& origin,
       const blink::WebURL& url) {
   return enabled_per_settings ? true : AllowMixedContent(url);
 }
 
 void AwContentSettingsClient::OnDestruct() {
   delete this;
 }
 
 }  // namespace android_webview